Read the article. He was being hoisted by one officer and was holding the roof when he saw him. When he officer went for his gun he fell.
So he wasn't in very good physical shape then.
These guys were doing some tough moves and I would not discredit their actions so easily. If anyone believes this was the will of God then they must know that the shooter had to proceed or we would not have the outcome we have, blessed is this country. Trump will roll over the deep state and the cockroaches in power in a unifying landslide because of this event.
It may also be postulated that this encounter forced a rush to target for the shooter and he subsequently didn't wait for Trump to be still. That would imply this one police officer actually saved Trump's life and he can be proud of his actions.